Solution:
Number of odd numbers up to 240 = = 120
Sum of first n odd numbers =
n = 120
Required sum =
The sum of odd numbers up-to 240 is
The sum of odd numbers up-to 240 is
The sum of odd numbers up-to 240 is
Number of odd numbers up to 240 = = 120
Sum of first n odd numbers =
n = 120
Required sum =
